Wilo DrainLift XL Notice De Montage Et De Mise En Service page 40

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8.2.3 Setting the pump follow-up time
The pump follow-up time must be set in the "Follow-up" menu in the switchgear.
• If, after switching off the pump when only water has been pumped without slurping (audi-
ble pumping of a water/air mixture), there is no or just a slight flap knock (closing noise of
the flap), the pump run-time should be set so that the pump switches off shortly before
slurping starts.
• If the flap slams closed after the pump switches off combined with vibrations in the unit
and pipework, this is to be stopped by adjusting the pump follow-up time. To do this,
adjust the run-on time in the "Follow-up" menu for the pump running time until it is pos-
sible to hear slurping of the water/air mixture at the end of the pumping procedure. The
slurping time should not exceed 3 s.
CAUTION! Risk of property damage!
Fluid hammer (by the closing of the non-return valves) can destroy the unit and dis-
charge pipeline. They are to be avoided onsite by means of appropriate measures (e.g.
additional valve with counterweight, follow-up time of the pumps).
8.3 Decommissioning
The unit must be decommissioned prior to maintenance or dismantling work.
WARNING! Risk of burns!
Depending on the operating status of the system, the entire pump can become very
hot. Touching the pump can cause burns.
Allow the unit and pump to cool to room temperature.
Dismantling and installation
• Dismantling and installation by qualified personnel only!
• Disconnect the system from the power supply and secure it against being switched on
again.
• Depressurise any pressure parts before carrying out any work on them.
• Close the gate valve (inlet and pressure pipe).
• Empty the collection reservoir (e.g. using diaphragm hand pump).
• Unscrew and remove the maintenance cover for cleaning.
DANGER! Risk of infection!
If the unit or unit components are to be sent in for repairs, the used unit should be
drained and cleaned before transport for reasons of hygiene. Furthermore, all parts
which may be touched must be disinfected (spray disinfection). The parts must be
packed in tear-proof plastic bags of sufficient size in such a manner that they are
tightly sealed and leak-proof. They are to be sent in without delay via instructed for-
warding agents.
After longer periods of non-use, check the unit for contaminants and clean, if necessary.
WILO SE 03/2011